S000004347 [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| iShares Russell 1000 ETF | iShares Russell 1000 ETF | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 17.19% | 24.33% | 26.40% | (19.24%) | 26.27% | 20.80% | 31.26% | (4.91%) | 21.52% | 11.91% |